Four's mind was in chaos, spinning from the new information. His feet lead while his mind spun. When they came to rest, he found himself in the training room. He sat down, unsure of what he should do. While training seemed like a good way to calm his mind, he wasn't sure he deserved that calm.
Deserved or not, calming his mind would help him be a better warrior, so he began to push his body through rigorous training. He did pull ups until he couldn't move, and sit ups until his abdomen was numb. Somehow, through the rhythmic motion of his body, his mind calmed giving him clarity.
As he brought his exhausted body to his room he found himself accepting of, if not okay with the revelations. He was a criminal. He had broken the law. Whatever reasons behind it were long forgotten. What's done is done. He had to find it in him to accept it and move on.
As his mind drifted off into dreamland, he found himself saddened at the loss of his own innocence. Regardless of whatever had happened in the past, he had been innocent the moment he awoke from stasis with the peculiar case of amnesia. He couldn't help the resentment he felt at losing that innocence so brutally and so publicly. He was glad of the knowledge, but as his eyes slowly closed, he found a small part of himself wishing things had gone differently. That his innocence had been preserved.